Organic light emitting devices employing non-doped structure

A kind of efficient non-doped white organic light-emitting diodes（WOLEDs） were realized by using a bright blue-emitting layer of 4,4-bis（2,2-diphenylvinyl）-1,1-biphenyl（DPVBi） combining with red emitting ultrathin layer of [2-methyl-6-[2-（2,3,6,7-tetrahydro-1H,5H-benzo[ij]quinolizin-9-yl）ethenyl]-4H...

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Published inOptoelectronics letters Vol. 13; no. 3; pp. 192 - 196
Main Author 杨惠山 杨琪珍 吴丽双
Format Journal Article
LanguageEnglish
Published Tianjin Tianjin University of Technology 01.05.2017
Springer Nature B.V
Subjects
2-苯并噻唑
Brightening
Devices
DPVBi
Efficiency
Emission
Lasers
Maximum power
Optical Devices
Optics
Organic light emitting diodes
Photonics
Physics
Physics and Astronomy
Power efficiency
国际照明委员会
有机发光二极管
有机电致发光器件
白光LED
结构
非掺杂
Online AccessGet full text
ISSN1673-1905
1993-5013
DOI10.1007/s11801-017-7042-5

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Summary:A kind of efficient non-doped white organic light-emitting diodes（WOLEDs） were realized by using a bright blue-emitting layer of 4,4-bis（2,2-diphenylvinyl）-1,1-biphenyl（DPVBi） combining with red emitting ultrathin layer of [2-methyl-6-[2-（2,3,6,7-tetrahydro-1H,5H-benzo[ij]quinolizin-9-yl）ethenyl]-4H-pyran-4-ylidene]propane-dinitrile（DCM2） and green emitting ultrathin layer of 10-（2-benzothiazolyl）-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H, 11H（1）-benzopyropyrano（6,7-8-i,j）quinolizin-11-one（C545T） with different thicknesses of 0.05 nm, 0.10 nm and 0.20 nm. For comparing, a doped WOLED was also fabricated, in which C545 T and DCM2 are codoped into DPVBi layer to provide blue, green and red emission for obtaining white emission. The maximum luminance and power efficiency of the doped WOLED are 5 765 cd/m2 at 16 V and 5.23 lm/W at 5 V, respectively, and its Commission Internationale de l＇Eclairage（CIE） coordinate changes from（0.393 7, 0.445 3） at 5 V to（0.300 7, 0.373 8） at 12 V. When the thickness of the ultrathin C545 T layer in non-doped WLEDs increases, the emission luminance increases, but all non-doped devices are in the yellow white region. The device with 0.10-nm-thick C545 T has a maximum efficiency of 15.23 cd/A at 8 V and a maximum power efficiency of 6.51 lm/W at 7 V, and its maximum luminance is 10 620 cd/m2 at 16 V. CIE coordinates of non-doped WLEDs with C545 T thickness of 0.05 nm, 0.10 nm and 0.20 nm are（0.447 3, 0.455 6）,（0.464 0, 0.473 1） and（0.458 4, 0.470 0） at 8 V, respectively.
Bibliography:coordinates tetrahydro tetramethyl biphenyl Internationale thick propane pyran benzo yellow
A kind of efficient non-doped white organic light-emitting diodes（WOLEDs） were realized by using a bright blue-emitting layer of 4,4-bis（2,2-diphenylvinyl）-1,1-biphenyl（DPVBi） combining with red emitting ultrathin layer of [2-methyl-6-[2-（2,3,6,7-tetrahydro-1H,5H-benzo[ij]quinolizin-9-yl）ethenyl]-4H-pyran-4-ylidene]propane-dinitrile（DCM2） and green emitting ultrathin layer of 10-（2-benzothiazolyl）-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H, 11H（1）-benzopyropyrano（6,7-8-i,j）quinolizin-11-one（C545T） with different thicknesses of 0.05 nm, 0.10 nm and 0.20 nm. For comparing, a doped WOLED was also fabricated, in which C545 T and DCM2 are codoped into DPVBi layer to provide blue, green and red emission for obtaining white emission. The maximum luminance and power efficiency of the doped WOLED are 5 765 cd/m2 at 16 V and 5.23 lm/W at 5 V, respectively, and its Commission Internationale de l＇Eclairage（CIE） coordinate changes from（0.393 7, 0.445 3） at 5 V to（0.300 7, 0.373 8） at 12 V. When the thickness of the ultrathin C545 T layer in non-doped WLEDs increases, the emission luminance increases, but all non-doped devices are in the yellow white region. The device with 0.10-nm-thick C545 T has a maximum efficiency of 15.23 cd/A at 8 V and a maximum power efficiency of 6.51 lm/W at 7 V, and its maximum luminance is 10 620 cd/m2 at 16 V. CIE coordinates of non-doped WLEDs with C545 T thickness of 0.05 nm, 0.10 nm and 0.20 nm are（0.447 3, 0.455 6）,（0.464 0, 0.473 1） and（0.458 4, 0.470 0） at 8 V, respectively.
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ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-017-7042-5